#pragma once

#include <iostream>
#include <string>
#include <functional>
#include <strings.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <cstring>
#include "Log.hpp"
#include "InetAddr.hpp"

using namespace LogModule;

using func_t = std::function<void(int sockfd, const std::string&, InetAddr&)>;

const int defaultfd = -1;

//进行网络通信的！
class ChatServer
{
public:
    ChatServer(uint16_t port, func_t func)
        : _port(port), _func(func), _isrunning(false), _sockfd(defaultfd)
    {}
    void Init()
    {
        //创建套接字
        _sockfd = socket(AF_INET, SOCK_DGRAM, 0);
        if(_sockfd < 0)
        {
            LOG(LogLevel::FATAL) << "socket error";
            exit(1);
        }
        LOG(LogLevel::DEBUG) << "socket success, sockfd: " << _sockfd;

        // 2. 绑定socket信息，ip和端口， ip(比较特殊，后续解释)
        // 2.1 填充sockaddr_in结构
        // **************从主机  -->  到网络*****************
        struct sockaddr_in local;
        bzero(&local, sizeof(local));
        local.sin_family = AF_INET;
        local.sin_port = htons(_port);
        local.sin_addr.s_addr = INADDR_ANY;

        //绑定
        int n = bind(_sockfd, (struct sockaddr*)&local, sizeof(local));
        if(n < 0)
        {
            LOG(LogLevel::FATAL) << "bind error";
            exit(2);
        }
        LOG(LogLevel::DEBUG) << "bind success, sockfd: " << _sockfd;
    }

    void Start()
    {
        _isrunning = true;
        while(_isrunning)
        {
            char buffer[1024];
            struct sockaddr_in peer;
            socklen_t len = sizeof(peer);

            //收消息
            ssize_t s = recvfrom(_sockfd, buffer, sizeof(buffer) - 1, 0, (struct sockaddr*)&peer, &len);
            if(s > 0)
            {
                //做出应答：消息的转发
                InetAddr client(peer);
                buffer[s] = 0;
                _func(_sockfd, buffer, client);
            }
        }
    }
    ~ChatServer()
    {}
    
private:
    uint16_t _port;
    int _sockfd;
    bool _isrunning;
    func_t _func;

};

